Structurally, the load switch, ring network switch, and fuse structure are simplified and placed in the transformer oil tank and immersed in oil. The transformer cancels the oil pillow, and the oil tank and radiator are exposed to the air.

The high-voltage chamber of the European-style box transformer is generally composed of high-voltage load switches, high-voltage fuses, lightning arresters, etc., which can perform power on and off operations and has overload and short-circuit protection. The low-voltage chamber is composed of low-voltage air circuit breakers, current transformers, ammeters, voltmeters, etc.

Raise the voltage generated by the wind power (photovoltaic) power generation device such as 690V (800V, etc.) to the 35kV voltage level and then input it into the power grid through the cable line. It is an ideal supporting equipment dedicated to the wind power (photovoltaic) power generation system.

Intelligent double-layer box-type substation is a new type of power distribution equipment. The transformer and low-voltage switch cabinet adopt a double-layer structure layout, which has high safety and reliability and can be widely applied in various fields such as cities, rural areas, factories, and mines. It has the advantages of small floor area, beautiful appearance, convenient installation, and small construction volume, which can meet the power supply needs of different places.

The buried transformer and the billboard-type low-voltage form two parts on the ground and underground, which do not occupy surface space, especially suitable for densely populated central cities.